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Re: [Spice-devel] [Qemu-devel] RFC: usb redirection over the network, in
From: |
Frédéric Grelot |
Subject: |
Re: [Spice-devel] [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice? |
Date: |
Mon, 29 Nov 2010 16:10:17 +0100 (CET) |
> > Not me at the moment, but unless you tunnel it inside another
> > protocol, you'd really want to look at the existing USB-over-IP
> > protocols instead of reinventing the wheel:
> > http://usbip.sourceforge.net/ (some support in Linux already IIRC)
> > (and there are others which I don't recall)
>
> Doesn't look very useful on a quick glance.
>
I'm note sure about what I will say, but will a kernel approach handle specific
disconnection/reconnection of devices, that libusb cannot?
I'm thinking in particular of what happens when one updates an iP* (*=hone, ad,
odTouch, od) device, where it gets connected and disconnected several times
during the process.
During the updates, the device reboots, generating a disconnection event, and
at reboot the guest OS (and iTunes) has to to catch the reconnection event
directly (before iOS loads) to upload the new firmware.
I'm not sure about it, but I think Virtualbox (non-ose) took care of this
issue, and updates are now possible in a vm (TbC).
I don't think that an approach at libusb level would work, while I could
understand that a kernel module would be able to catch the "connection" event
directly, and pipe it through the network to the guest.
I don't know for sure if this use case affects only those devices, nor if it is
an objective for spice to allow Apple device updates, but I think it has to be
handled at pretty low level, so is worth mentioning before any implementation
choices.
Still, if such thing were to work, I think it would be a huge step for all the
people in the iP* community that maintain a double boot only because they
bought a closed phone once :-)
However, the guest side could be handled at qemu-level, since it would
certainly provide an OS-independent implementation without the need for
linux-/windows-/other-specific driver.
Frederic.
- [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, Hans de Goede, 2010/11/29
- Re: [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, François Revol, 2010/11/29
- Re: [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, Gerd Hoffmann, 2010/11/29
- Re: [Spice-devel] [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?,
Frédéric Grelot <=
- Re: [Spice-devel] [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, Gerd Hoffmann, 2010/11/29
- Re: [Spice-devel] [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, Attila Sukosd, 2010/11/29
- Re: [Spice-devel] [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, Anthony Liguori, 2010/11/29
- Re: [Spice-devel] [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, Alexander Graf, 2010/11/29
- Re: [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, Paul Brook, 2010/11/29
- Re: [Qemu-devel] RFC: usb redirection over the network, interesting outside of spice?, François Revol, 2010/11/29